I don't get why the writer refers to GSP as "kingpin" instead of simply using "champion" as he did with Silva? I'm not trying to nitpick, honestly, I just found it curious. If you're going to use the label of "kingpin", I'd think Silva would deserve it more since he's reigned longer as champion than anyone.

personally i think it is just because writers don't seem to think they can use a word more than once in the same sentence or there readers won't read there articles, instead they try to jazz it up by using synonyms to say the same thing. I guess he thinks kingpin is a synonym for champion.